(181023) -- SHIJIAZHUANG, Oct. 23, 2018 (Xinhua) -- Villagers work at a vegetable planting base in Jinzhou, north China's Hebei Province, Oct. 23, 2018, the day of the First Frost. First Frost, also known as Shuangjiang, is one of the 24 solar terms of the Chinese lunar calendar. (Xinhua/Jia Zaixing)